Warning: The following contains SPOILERS for Earth-Prime: Batwoman #1 and Supergirl season 6.
The first issue of the Earth-Prime mini-series confirmed just when in the Arrowverse timeline Supergirl season 6 takes place. This was a point of confusion for many, given all of the usual events which synched up the television shows making up the shared universe of the CW superheroes were canceled in the wake of the COVID-19 pandemic. Thankfully, a conversation between Lena Luthor and Ryan Wilder in Earth-Prime: Batwoman #1 confirmed when the events of Supergirl season 6 occurred and also offered a sample of the crossovers that couldn't be filmed over the past two years.
The action of Earth-Prime: Batwoman (by Natalie Abrams, Kelly Larson, Clayton Henry, and Marcelo Maiolo) was set in the middle of Batwoman season 3, as Ryan Wilder found herself under fire on multiple fronts. Beyond being blackmailed by former GCPD Detective Renee Montoya and threatened by business magnate Jada Jet, Ryan had also just been forced out of her position as CEO of Wayne Enterprises in favor of her half-brother, Marquis Jet. To add insult to injury, this last action had been facilitated, in part, by her best friend, Dr. Mary Hamilton, who had become possessed by Poison Ivy.
Related: Batwing's Forgotten Romance Is Finally Explained in Batwoman Continuity
Given the stress she was under, it was unsurprising that Ryan forgot that she had an appointment with Lena Luthor. The supergenius scientist turned sorceress from Supergirl had officially come to Gotham City to discuss acquiring a sample of Victor Fries' technology for a new renewable energy source. Unofficially she had come to deliver a message from Supergirl regarding the first Batwoman Kate Kane
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